Configuring the address pins of 8-bit SDRAM

[sowmiya_a]

Hi,

In evaluation board of i.MXRT1024, a 16-bit SDRAM (IS42S16160J-6TLI )is interfaced to controller. In that, Address lines are configured from A0 to A13.

We are using MIMXRT1024CAG4B and planning to interface a 8-bit SDRAM (IS42S86400F-7TLI) in our design. Can I configure the address pins of 8-bit SDRAM from A0 or is there any specific constraints in configuring these address pins?

[EdwinHz · Accepted solution]

Yes, this is correct.

[EdwinHz]

Hi @sowmiya_a,

The connection are OK, except for the DQM pin. For 8bit SDRAM, SEMC_DM0 (GPIO_EMC_08) should be used, and SEMC_DM1 (GPIO_EMC_31) should be left unconnected.

BR,
Edwin.

[sowmiya_a]

Hi Edwin,

Thanks for the response.

I will modify the connection of DQM pin. Based on your response, it seems like the configuration of the address pins of the 8-bit SDRAM is correct. Can you confirm if my understanding is correct?

Regards,

Sowmiya